Abstract: An OLED display device includes a substrate; an organic light emitting element having a first electrode formed on the substrate, an organic emission layer disposed on the first electrode, and a second electrode disposed on the organic emission layer; a common power bus line disposed between the organic light emitting element and an edge of the substrate on the substrate and electrically connected with the first electrode; a driving power bus line neighboring the common power bus line on the substrate, disposed between the organic light emitting element and the edge of the substrate, and electrically connected with the second electrode extended from a portion corresponding to the organic emission layer; and a connection wire made of the same material as the second electrode on the common power bus line, separated from the second electrode, and electrically connected with the common power bus line.

Abstract: An organic light emitting display device is capable of securing sufficient compensation period such that a threshold voltage of a driving transistor may be compensated. A pixel includes: an organic light emitting diode; a second transistor for controlling an amount of current supplied from a first power source to the organic light emitting diode; a first capacitor having a first terminal coupled to a gate electrode of the second transistor; a first transistor coupled between a second terminal of the first capacitor and a data line, and being configured to turn on when a scan signal is supplied to a scan line; and a third transistor coupled between a gate electrode and a second electrode of the second transistor and having a turning-on period that is not overlapped with that of the first transistor. The third transistor is configured to turn on for a longer time than the first transistor.

Abstract: A pixel includes: an OLED; a first transistor having a first electrode coupled to a power source and a second electrode coupled to the OLED and configured to control a magnitude of current supplied to the OLED; a third transistor having a first electrode coupled a first node and a second electrode coupled to a gate electrode of the first transistor; a capacitor coupled between the first node and a second electrode of the first transistor; a second transistor having a first electrode coupled to the first node and a second electrode coupled to a data line and configured to be turned on when the third transistor is turned off; and a fourth transistor having a first electrode coupled to a gate electrode of the first transistor and a second electrode coupled to a reference power source and configured to be turned on and off concurrently with the second transistor.

Abstract: A pixel circuit includes: an OLED; a second transistor including gate, first, and second terminals coupled to a first scan line, a data line, and a first node, respectively; a fourth transistor including gate, first, and second terminals coupled to a third scan line, the first node, and a second node, respectively; a third transistor including gate, first, and second terminals coupled to a second scan line, a reference power source, and the second node, respectively; a fifth transistor including gate, first, and second terminals coupled to a light emission control line, a third node, and an anode of the OLED, respectively; a first capacitor coupled between the first and second nodes; a second capacitor coupled between the second and third nodes; and a first transistor including gate, first, and second terminals coupled to the first node, a first power source, and the third node, respectively.

Abstract: A pixel circuit including an organic light emitting diode. Also, the pixel circuit includes: a second transistor connected to a first scanning line, a data line, and a first node; a fifth transistor connected to a third scanning line, the first node, and a second node; a fourth transistor connected to a second scanning line, a first reference voltage, and the second node; a third transistor connected to the first scanning line, a second reference voltage, and a third node; a first capacitor connected between the first node and the second node; a second capacitor connected between the second node and the third node; and a first transistor connected to the first node, a first power, and the third node, and configured to drive the organic light emitting diode.

Abstract: A pixel capable of displaying images with substantially uniform luminance and an organic light emitting display device using the same are provided. An organic light emitting display device is driven in a frame divided into a reset period, a compensation period and an emission period. The organic light emitting display device includes pixels coupled to scan lines and data lines. First and second control lines are commonly coupled to the pixels. A control line driver supplies first and second control signals to the respective first and second control lines. A scan driver concurrently supplies a scan signal to the scan lines during a time in the reset and compensation periods. A data driver supplies a reset voltage to the data lines during the time in the reset and compensation periods.

Abstract: A thin film transistor, e.g., for use in an organic light emitting display, may include: a gate insulating layer disposed on a gate electrode located on a substrate; a semiconductor layer, disposed on the gate insulating layer; and a planarization layer disposed on the gate insulating layer, the source and drain electrodes, and the channel area, and having openings exposing parts of the first source and drain areas and the source and drain electrodes, respectively. The semiconductor layer may include: a channel area corresponding to the gate electrode; first source and drain areas doped with an impurity outside the channel area; second source and drain areas, including a metal, outside the first source and drain areas; and source and drain electrodes disposed on the second source and drain areas and exposing the first source and drain areas. A pixel electrode may be disposed in one of the openings.

Abstract: An organic light emitting display device includes: a plurality of pixels at crossing regions of a plurality of scan lines and data lines; a first control line and a second control line commonly connected with the plurality of pixels; a control line driver configured to supply a first control signal to the first control line and a second control signal to the second control line, where the second control signal is not concurrent with the first control signal; and a first power supply that supplies a first power to each of the plurality of pixels, where a voltage level of the first power is configured to change at least once during a frame period for each of the pixels.

Abstract: A thin film transistor (TFT) may include a substrate, a gate electrode on the substrate, a gate insulating layer on the gate electrode, and a semiconductor layer on the gate insulating layer. The semiconductor layer may include a top surface, a channel area aligned in a vertical direction with the gate electrode, a plurality of doped areas proximate to the channel area, and a plurality of non-doped areas. Source and drain electrodes may be on the top surface of the semiconductor layer aligned above respective ones of the plurality of non-doped areas of the semiconductor layer. A planarization layer may be on the gate insulating layer, the source and drain electrodes and the semiconductor layer channel area, and may include a plurality of openings respectively exposing the plurality of doped areas of the semiconductor layer and a portion of the source electrode and the drain electrode.

Abstract: A TFT includes a substrate, a source electrode and a drain electrode on the substrate, the source and drain electrodes separated from each other, an active layer on the substrate between the source electrode and the drain electrode, a cladding unit on side surfaces of the source electrode and the drain electrode, a gate insulating layer on the substrate, the gate insulating layer overlapping the active layer and the cladding unit, and a gate electrode on the gate insulating layer, the gate electrode overlapping the active layer.

Abstract: A pixel includes: an organic light emitting diode coupled between a first power supply and a second power supply; a first transistor coupled between the organic light emitting diode and the second power supply; a second transistor coupled to a first node to which a gate electrode of the first transistor is coupled; a first capacitor coupled between the first node and a second node; a third transistor coupled between the second node and a data line; a fourth transistor coupled between the first node and the second node; a fifth transistor coupled between the first transistor and the second power supply; and a second capacitor coupled between the second node and a third node between the first transistor and the fifth transistor.

Abstract: An organic light emitting display apparatus including: a substrate; a thin film transistor formed on the substrate; a planarization layer formed on the substrate to cover the thin film transistor and comprising a closed-loop groove; a pixel electrode that contacts the thin film transistor and is formed on the planarization layer; a pixel defining layer formed to fill the closed-loop groove; a spacer formed on the planarization layer and disposed outside the pixel electrode; an organic light emitting layer formed on the pixel electrode; and an opposite electrode covering the organic light emitting layer.

Abstract: A pixel includes an organic light emitting diode (OLED) having a cathode electrode coupled to a second power source, a first transistor for controlling an amount of current that flows from a first power source to the second power source via the OLED corresponding to a data signal, a second transistor coupled between a data line and a gate electrode of the first transistor, a third transistor coupled between the gate electrode of the first transistor and a reference power source, a fourth transistor coupled between the third transistor and the reference power source, a fifth transistor coupled between an anode electrode of the OLED and an initial power source, a first capacitor coupled between the anode electrode of the OLED and a node between the third transistor and the fourth transistor, and a second capacitor coupled between the node and the gate electrode of the first transistor.

Abstract: An organic light emitting display device capable of improving image quality on a large panel. The organic light emitting display device includes a panel divided into at least two regions including a first region crystallized by a first crystallization process and a second region crystallized by a second crystallization process, in which a boundary part of the first and second regions is subject to both the first crystallization process and the second crystallization process, and further includes: organic light emitting diodes at crossing regions of scan lines and data lines; and pixel circuits at the crossing regions and configured to supply currents to the organic light emitting diodes. Here, couplings between the pixel circuits within the first region and the boundary part and their respective organic light emitting diodes are different from couplings between the pixel circuits within the second region and their respective organic light emitting diodes.

Abstract: A pixel includes an organic light emitting diode; a first transistor; a second transistor coupled to a data line and turned on when a scan signal is supplied to an ith scan line; a third transistor between the second transistor and a gate electrode of the first transistor and turned on when a scan signal is supplied to an i+1th scan line; a fourth transistor between the gate electrode of the first transistor and a reference power supply and turned on when the scan signal is supplied to the ith scan line; a fifth transistor between the organic light emitting diode and an initial power supply and turned on when a control signal is supplied; a first capacitor between the organic light emitting diode and a node between the second transistor and the third transistor; and a second capacitor between the node and the gate electrode of the first transistor.

Abstract: An organic light emitting display device compensates for a variation of the threshold voltage of a driving transistor. A scan driver and a data driver drive a plurality of pixels. A pixel of the pixels includes an organic light emitting diode, four transistors, and two capacitors. A first transistor controls a current to the organic light emitting diode. Second and third transistors are coupled between a data line from the data driver and a gate electrode of the first transistor. A fourth transistor is coupled between a reference power supply and the gate electrode of the first transistor. The two capacitors are coupled between the organic light emitting diode and respective electrodes of the third transistor.

Abstract: A pixel includes: an organic light emitting diode coupled between a first power supply and a second power supply; a first transistor coupled between the organic light emitting diode and the second power supply; a second transistor coupled to a first node to which a gate electrode of the first transistor is coupled; a first capacitor coupled between the first node and a second node; a third transistor coupled between the second node and a data line; a fourth transistor coupled between the first node and the second node; a fifth transistor coupled between the first transistor and the second power supply; and a second capacitor coupled between the second node and a third node between the first transistor and the fifth transistor.

Abstract: A TFT includes a substrate, a source electrode and a drain electrode on the substrate, the source and drain electrodes separated from each other, an active layer on the substrate between the source electrode and the drain electrode, a cladding unit on side surfaces of the source electrode and the drain electrode, a gate insulating layer on the substrate, the gate insulating layer overlapping the active layer and the cladding unit, and a gate electrode on the gate insulating layer, the gate electrode overlapping the active layer.

Abstract: An organic light emitting display device includes a scan driver for sequentially supplying a scan signal through scan lines; a data driver for supplying an initial power through data lines during a first period of a time period when the scan signal is supplied through a corresponding scan line of the scan lines, and for supplying data signals to the data lines during a second period of the time period when the scan signal is supplied through the corresponding scan line, the second period following the first period; and pixels at crossing regions of the scan lines and the data lines.

Abstract: A flat panel display including a semiconductor circuit, and a method of manufacturing the semiconductor circuit are disclosed. In one embodiment, the semiconductor circuit includes i) a substrate, ii) a semiconductor layer and a first capacitor electrode formed on the substrate, the first capacitor electrode being doped to be conductive, iii) an insulating layer covering the semiconductor layer and the first capacitor electrode, iv) a gate electrode disposed on the insulating layer and corresponding to a portion of the semiconductor layer, and v) a second capacitor electrode disposed on the insulating layer and corresponding to the first capacitor electrode, wherein the gate electrode is thicker than the second capacitor electrode.